Model. SILVERADO 2500HD. Chevrolet Silverado 2500 HD Replacement Fuel Level Sending Unit Information.Body. Engine. 2001 (01) Chevrolet Silverado 2500 HD. Standard Cab Pickup. The 2008 Chevrolet Silverado 2500HD is like a bodybuilder in a tuxedo. You can visually discriminate between a light-duty Silverado 1500 from its more capable brethren, thanks to the HDs raised hood and divergent grille design. While different, compared to the Ford Super Duty, the Chevy looks tame. In 2001 Chevrolet Silverado 2500HD was released in 28 different versions, 1 of which are in a body "Crew Cab Pickup" and 1 in the body "Extended Cab Pickup". At the time, according to the manufacturers recommendations I have a 01 Chevy 2500 Hd with an 8.1 was running great, yesterday I had a new exhaust system put on it and now the truck is bogging down, it doesnt seem toJump to content. 2000-2006 2007-2014 Chevrolet Silverado GMC Sierra 2500HD/3500HD. 2001 Chevrolet Silverado 2500HD LS Crew CabLS Crew Cab. Available Engines and Transmissions: 6.0 Liter OHV 16-Valve Vortec V8. 4 Speed Automatic.